Add post about Signal 1

config.toml

@@ -20,10 +20,11 @@ pygmentsstyle = "monokai"
 
 [permalinks] 
   blog        = "/:year/:month/:day/:slug/"
-  audio = "/audio/:slug/"
+  electronics = "/:year/:month/:day/:slug/"
 
 [taxonomies]
   category = "categories"
+  tag = "tags"
 
 [params]
 dateform = "2 Jan, 2006"
@@ -36,7 +37,7 @@ faviconfile = "favicon.ico"
 highlightjs = true
 progressively = true
 share = true
-latestpostcount = 10
+latestpostcount = 7
 github = "ariejan"
 email = "ariejan@devroom.io"
 linkedin = "ariejan"

content/audio/signal-1-part-1.md

@@ -1,9 +0,0 @@
-+++
-date = "2017-10-16"
-title = "Signal 1 - Design and Requirements (Part 1)"
-tags = ["audio", "design", "electronics"]
-description = ""
-slug = "signal-1-design-and-requirements-part-1"
-+++
-
-Signal 1

content/electronics/signal-1-part-1.md

@@ -0,0 +1,41 @@
++++
+date = "2017-10-16"
+title = "Signal 1 - DIY Signal Generator (Part 1)"
+tags = ["audio", "design", "electronics", "signal-1"]
+description = "This is part 1 in a series of posts showing you how I build a digitally controlled signal generator based on the AD9833."
+slug = "signal-1-diy-signal-generator-part-1"
++++
+
+**Signal 1** is the name for my first _signal generator_ project. The goal for this project
+is to create a device that can output clean sine waves in the 10 Hz - 100 kHz range. The 
+primary use is testing audio equipment, like amplifiers. 
+
+This is what I'm looking for:
+
+ * Sine wave
+ * 10 Hz - 100 kHz minimum, easily adjustable
+ * Line level output (100-600 Ohm output impedance; 2Vpp)
+ * Display of frequency and Vpp settings
+
+Bonus features:
+
+ * Other waveforms, like triangle and square wave
+ * Larger frequency range
+ * PWM support
+ * Graphical display for all kinds of information
+
+There are at this point two pieces of hardware I have selected:
+
+**AD9833 Programmable Waveform Generator** is a nice chip that can more than handle my simple needs. If
+it can go up to a 16Mhz square wave, that'd be great, but not necessary. It's also inexpensive when bought
+from China as a breakout board. I'm not usually a fan of there boards, but to for prototyping they should
+be fine. The AD9833 communicates for SPI, so I'll need a microcontroller to handle that.
+
+![The AD9833 Breakout Board](/img/signal-1-ad9833-breakout.jpg)
+
+**ATMega xxx** is a logical choice for me. I'm not tied down to Arduino, so writing C directly in the
+_Atmel Studio_ would be OK. Having a microcontroller present also opens up the possibility of having 
+a decent screen (maybe even touchscreen) on this project.
+
+For now, I've ordered a few AD9833 breakout boards from China and I'll start working on a block diagram
+of the entire system soon, which you can read about in Part 2 of this series.

themes/cocoa-eh/layouts/electronics/single.html

@@ -0,0 +1,80 @@
+{{ partial "header.html" . }}
+
+<section class="main post non-narrow zero-top-spacing">
+    <div class="container">
+        <div class="content">
+            <div class="front-matter">
+                <div class="title-container">
+                    {{ partial "page-heading" . }}
+                </div>
+                <div class="meta">
+                    <div class="date" title="{{ .Date.Format .Site.Params.dateformfull }}">{{ .Date.Format .Site.Params.dateform }}</div>
+                    {{ if not .Params.noauthor }}
+                        {{ if .Params.author }}
+                        <div class="author" title="{{ .Params.Author }}"><div class="middot"></div>{{ .Params.author }}</div>
+                        {{end}}
+                    {{end}}
+                    <div class="reading-time"><div class="middot"></div>{{ .ReadingTime }} minute read</div>
+                    <div class="tags">
+                        <ul>
+                          {{ range .Params.tags }}
+                            <div class="middot"></div>
+                            <li><a href="{{ "/tags/" | relLangURL }}{{ . | urlize }}">{{ . }}</a> </li>
+                          {{ end }}
+                        </ul>
+                    </div>
+                    <div class="tags">
+                        <ul>
+                          {{ if isset .Params "hacker_news_id" }}
+                            <div class="middot"></div>
+                            <li><a href="https://news.ycombinator.com/item?id={{ .Params.hacker_news_id }}">Hacker News</a> </li>
+                          {{ end }}
+                          {{ if isset .Params "lobsters_id" }}
+                            <div class="middot"></div>
+                            <li><a href="https://lobste.rs/s/{{ .Params.lobsters_id }}">Lobsters</a> </li>
+                          {{ end }}
+                        </ul>
+                    </div>
+                </div>
+            </div>
+            <div class="markdown">
+                {{ partial "content" . }}
+                <br>
+            </div>
+            {{ if .Site.Params.share }}
+            <div class="share">
+                <a href="" class="ssk ssk-facebook"></a>
+                <a href="" class="ssk ssk-twitter"></a>
+                <a href="" class="ssk ssk-google-plus"></a>
+                <a href="" class="ssk ssk-linkedin"></a>
+            </div>
+            {{ end }}
+            {{ if .Site.Params.posts_navigation }}
+                <div class="navigation">
+                    {{ if .PrevInSection }}
+                    <div>
+                        <img class="icon" src="/img/back.svg" alt="back" />
+                        <a href="{{ .PrevInSection.Permalink }}">{{ .PrevInSection.Title }}</a>
+                    </div>
+                    {{ end }}
+                    <div style="width: 100%;"></div>
+                    {{ if .NextInSection }}
+                    <div>
+                        <a href="{{ .NextInSection.Permalink }}">{{ .NextInSection.Title }}</a>
+                        <img class="icon" src="/img/next.svg" alt="next" />
+                    </div>
+                    {{ end }}
+                </div>
+            {{ end }}
+            <br>
+            <div class="disqus">
+                {{ template "_internal/disqus.html" . }}
+            </div>
+            {{ if .Site.Params.issoHost }}
+            <div class="isso" id="isso-thread"></div>
+            {{ end }}
+        </div>
+    </div>
+</section>
+
+{{ partial "footer.html" . }}

themes/cocoa-eh/layouts/index.html

@@ -14,7 +14,7 @@
                 {{ if gt $nbPosts 0 }}
                     <div class="page-heading">Latest posts</div>
                     <ul>
-                    {{ range (first .Site.Params.latestpostcount (where .Pages "Section" "blog")).GroupByDate "Jan, 2006" "desc" }}
+                    {{ range (first .Site.Params.latestpostcount .Pages).GroupByDate "Jan, 2006" "desc" }}
                         <li class="groupby">{{ .Key }}</li>
                         {{ range .Pages.ByPublishDate.Reverse }}
                             {{ partial "li.html" . }}

themes/cocoa-eh/layouts/partials/header.html

@@ -26,8 +26,6 @@
                             {{ end }}
                         {{ end }}
                     {{ end }}
-                    <a href="/categories/audio-repair"><li>Audio Repair</li></a>
-                    <a href="/categories/electronics"><li>Electronics</li></a>
                     <a href="/about"><li>About</li></a>
                     <a href="/gpg"><li>GPG</li></a>
                 </ul>

themes/cocoa-eh/layouts/section/electronics.html

@@ -0,0 +1,19 @@
+{{ partial "header.html" . }}
+<section class="main">
+    <div class="container">
+        <div class="content">
+            <div class="posts">
+                <div class="page-heading">Blog</div>
+                <ul>
+                    {{ range .Data.Pages.GroupByDate "Jan, 2006" "desc"}}
+                        <li class="groupby">{{ .Key }}</li>
+                        {{ range .Pages.ByPublishDate.Reverse }}
+                            {{ partial "li.html" . }}
+                        {{ end }}
+                    {{ end }}
+                </ul>
+            </div>
+        </div>
+    </div>
+</section>
+{{ partial "footer.html" . }}